改性PZT陶瓷的大场诱应变效应  

The Large Field-induced Strain Effects on Modified PZT Ceramics

作　　者：刘付德[1] 凌志远[1] 谢进[1] 张穗真 

机构地区：[1]华南理工大学无机系

出　　处：《功能材料》1995年第4期328-331,共4页Journal of Functional Materials

摘　　要：研究了改性锆钛酸铅（ＰＺＴ）陶瓷材料的场诱应变性能与组成的变化关系。结果表明，材料组成选取既位于９０°畴成份占较大比例的菱方相，且处于机电耦合特性较强的相界处，同时采用适量的等价离子Ａ位取代以及适量的Ａ位和Ｂ位施主掺杂，有利于实现大场诱应变小滞后特性。This paper reports the relationshipbetween field-induced strain and camposition in Ba doped PZT ceramics.It is shown that the composition lies in the rhombohedral in which 90°domain is in a large portion and near the phase boundary between rhombohedral and tetragonal which has high electromechanical coupling coefficient.It is also shown that the substituting of proper Sr￣(2+) ion in A site and the doping with Bi￣(3+) and Ta￣(5+) ions in A and B sites respectively give a strain perpendicular to field of 0. 53%(E=2kV/mm).

关 键 词：改性 PZT陶瓷 电致伸缩 压电应变 锆钛酸铅 

分 类 号：TM282[一般工业技术—材料科学与工程]